docs: def check_version():
      """Check that submit50 is the latest version according to submit50.io."""
      # Retrieve version info
      res = requests.get("https://cs50.me/versions/submit50")  # TODO change this to submit50.io!
      if res.status_code != 200:
          raise Error(_("You have an unknown version of submit50. "
                        "Email sysadmins@cs50.harvard.edu!"))
  
      # Check that latest version == version installed
      required_required = pkg_resources.parse_version(res.text.strip())